Here’s an Amazon link. Amazon links change over time and they don’t give anyone any notice. Make sure you buy the 3-piece one with Presto part number 50332. Ask someone on Amazon if you have to before buying, and though price varies by phase of the moon on Amazon, you should never have to pay more than 15 to 30 dollars for it in North America at the very very most! If you see it costing more than that, keep searching, cheaper will turn up.

This should cost no more than around 10 to 20 bucks in North America, depending on seller, phase of the moon and country you are in. If you see it costing more than that, keep searching, cheaper will turn up.